feat(crm): dedupe duplicates, fix deal titles, and add cleanup CLI

Merge duplicate companies/persons/deals by name, remove duplicate contact
info and opportunity members, and rename malformed " @ Company" titles.
Applications sync now avoids empty-position titles and duplicate members.

Co-authored-by: Cursor <cursoragent@cursor.com>

crm_normalize.go

@@ -0,0 +1,84 @@
+package onlyoffice
+
+import (
+	"regexp"
+	"strings"
+)
+
+var multiSpace = regexp.MustCompile(`\s+`)
+
+// NormalizeCompanyName lowercases and collapses whitespace for grouping.
+func NormalizeCompanyName(s string) string {
+	return collapseKey(s)
+}
+
+// NormalizePersonKey builds a grouping key from first and last name.
+func NormalizePersonKey(first, last string) string {
+	return collapseKey(strings.TrimSpace(first) + " " + strings.TrimSpace(last))
+}
+
+// NormalizeOpportunityTitle lowercases and trims a deal title for exact dedupe.
+func NormalizeOpportunityTitle(s string) string {
+	return collapseKey(s)
+}
+
+// StripCompanySuffix removes a trailing " @ Company" segment when present.
+func StripCompanySuffix(title string) string {
+	title = strings.TrimSpace(title)
+	if i := strings.LastIndex(title, " @ "); i >= 0 {
+		return strings.TrimSpace(title[:i])
+	}
+	return title
+}
+
+// FixDealTitle strips a leading @, normalizes separator spacing, and collapses
+// empty-position titles like " @ contoso" to "contoso".
+func FixDealTitle(s string) string {
+	s = strings.TrimSpace(s)
+	for strings.HasPrefix(s, "@") {
+		s = strings.TrimSpace(strings.TrimPrefix(s, "@"))
+	}
+	if s == "" {
+		return ""
+	}
+	if i := strings.Index(s, "@"); i >= 0 {
+		left := strings.TrimSpace(s[:i])
+		right := strings.TrimSpace(s[i+1:])
+		if left == "" && right != "" {
+			return right
+		}
+		if left != "" && right != "" {
+			return left + " @ " + right
+		}
+	}
+	return s
+}
+
+// ContactInfoKey groups contact info rows by type and normalized value.
+func ContactInfoKey(infoType, value string) string {
+	return strings.ToLower(strings.TrimSpace(infoType)) + "|" + strings.ToLower(strings.TrimSpace(value))
+}
+
+// MemberDisplayKey normalizes a member displayName for duplicate detection.
+func MemberDisplayKey(displayName string) string {
+	return NormalizeCompanyName(displayName)
+}
+
+func collapseKey(s string) string {
+	s = strings.TrimSpace(s)
+	s = multiSpace.ReplaceAllString(s, " ")
+	return strings.ToLower(s)
+}
+
+// DealTitleForApplication builds the sync deal title from position and company.
+func DealTitleForApplication(position, company string) string {
+	position = strings.TrimSpace(position)
+	company = strings.TrimSpace(company)
+	if company == "" {
+		return position
+	}
+	if position == "" {
+		return company
+	}
+	return position + " @ " + company
+}